Add a new material to a part using a VBA macro

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Can anybody help?

Is it possible, using an Inventor VBA macro, to add a new material to a part file (ipt)?

For example only!

All I want to do is to add a new material called, for example, "Free Cutting Copper"

I have used the following link but it does not work!

http://www.deelip.com/?p=1550

Many thanks in advance!!!!

Darren